Composite tire for wheels.



UNITED STATES PATENT OFFICE.

EDWARD I. BRAPDOOK. OF WINCHESTER, MASSACHUSETTS.

COMPOSITE TIRE Foe WHEELS.

SPECIFICATION formingpart of Letters Patent No. 722,804, dated March 17,1903.

Application filed June 14, 1902. Serial No; 111,611. (llo model.)

To aZZ whom it may concern.-

Be it known that I, EDWARD I. BRADDOCK, a citizen of the United States,residing in Winchester, in the county of Middlesex and State ofMassachusetts, have invented an Improvement in Composite Tires forWheels, of which the following descri ption,in connection with theaccompanying drawings, is a specification, like letters on the drawingsrepresenting like parts.

This invention relates to a wheel, and more particularly to the rim ortire of the same, and has for its object to provide a novel tire or rimwith which the traction of the wheel may bdfincreased.

The invention is adapted, among other uses, to be embodied in a wheelemployed on vehiclesdesigned to carry heavy loads, whereby the tractionof the wheels on. streets which are paved or which have smooth orslippery surfaces is increased, so as to reduce to a minimum theslipping of the wheels, thereby enabling the vehicle to-be drawn oversuch surfaces with a minimum power. For this purpose I provide the wheelwith a tire or rim of iron or steel having a wearing or gripping surfaceof softer inetalsuch as lead, tin, zinc, and the like or alloys of thesame, which gripping-surface is molecnlarly united to the iron or steelportion of the rim or tire. These andpther features of this inventionwill be pointed out in the claims at the end of this specification.

Figure 1 is an elevation of one form of wheel provided with a rim ortire embodying this invention; Fig. 2, a developed view of one sectionof the rim or tire shown in Fig. l;

- Fig. 3, a detail in section and on an enlarged scale, to be referredto; and Fig. 4, a modification, to be referred to.

The wheel a maybe of any suitable or usual constrnction,and as hereinrepresented is provided with a composite metal tire or rim, which may bemade in sections, as shown, or which mzfy be made in a single piece. Inthe present instance I have represented the com posite metalrim or tireas composed of four sections, each of .which comprises a casting b, ofiron or steel, and one or more gripping-surfaces c, composed of softermetal-such as lead, tin, zinc, or their alloys-which are mo-.

lecularly united to the iron and steel casting.

The molecular union referred to is represented in Figs. 2 and 3 by theheavy black line d, and this union may be effected in a manner similarto that now practiced in tinning iron or steel-namely, the iron or steelcasting b is made with one or more channels,

recesses, or sockets 0, (herein shown in Figs 2 and 3 as three inn-u'mber)and after the said casting is cleansed and fiuxed in the usualmanner-.-as, for instance, by first dipping, the casting in acid, suchas sulfuric or hydrochloric, and then in a solution of chlorid ofzincmolten lead orlike metal is poured into the said cavities orrecesses until it is substantially flush with the outer surface of thecasting. The union of the lead or other gripping metal with the iron orsteel is such that the two metals are practically one.

The composite tire or section of a tire may be secured to the peripheryof the wheel a by boltsf or in any other suitable manner, and

to relieve said bolts from shearingv strain means are provided forpreventing lateral movement of the composite tire, which means are shownin the present instance as lips or flanges g on opposite sides of theiron or steel portion of the tire. (See Fig. 3.)

The channels, sockets, or cavities e in the iron or steel portion of thecomposite tire may be straight or of other shape, and they may beconnected together or independent of one another. So, also, if desired,the iron or steel portion of the composite rim or tire may be providedwith a single groove, channel, or recess of substantially the width ofthe tire or rim, which is filled with lead, zinc, &c., mo lecularlyunited to the iron or steel, as indicatedin Fig. 4. The constructionshown in Fig. 4: is more particularly designed for wheels employed onlight vehicles.

The composite rim or tire may be applied to the wheels of vehicles nowin use, in which case it is fitted over the usual flat iron or steelband h, or it may be applied directly to the wooden rim 1' of the wheel.So, also, I may employ a ,layer j'of' lead, zinc, tin, or like materialbetween the composite rim and the iron or steel band h, if the latter isused, or between the composite tire and the wooden rim '6, if the steelband h is omitted.

The metal layer 7' acts as a bed to receive the rough casting andthereby obtain a solid and uniform bearing for the composite tire. Thespace between the abutting ends of the tire or sections of the tire maybe filled with lead, tin, zinc, or like metal, which is indicated inFig. 1 by the heavy black line 7r.

By means of the molecular union between the lead or other softer metaland the iron or steel portion of the rim the said softer metal is firmlysecured or fastened to said iron or steel portion, and is thus preventedfrom being worked out or displaced from the groove or channel by dirt,gravel, &c., with which it may comein contactin actual service.

I claim- 1. The combination with a wheel, of a composite tire or rimsecured thereto and comprising an iron or steel portion having achannel, socket or recess in its outer surface, and a body of softermetal than said iron or steel, substantially filling the said channel,socket or recess and molecular-1y united to the iron or steel portion ofthe tire, substantially as described.

2. The combination with a wheel, of a composite tire or rim securedthereto and comprising an iron or steel portion having a channel, socketor recess in its outer surface, and provided with means for preventinglateral movement ofthe said tire, and a body of softer metal than saidiron or steel substantially filling the said channel, socket or recessand molecularly united to the iron or steel portion, substantially asdescribed.

3. The combination with a wheel, of a composite tire having itswearing-surface composed of iron or steel and a softer metal such aslead, tin, zinc and the like molecularly united to the iron or steel,substantially as described.

4. The combination with a wheel, of acomposite tire having itswearing-surface composed of iron or steel and a softer metal such aslead", tin, zinc and the like molecularly.

united to the iron or steel, and a layer of cushioning materialinterposed between the composite tire and the rim of the wheel,substantially as described.

5. A composite metal tire for wheels, consisting of an iron or steelportion provided with a channel, recess or socket in its outer surfaceand a body or layer of softer metal, such as lead, tin, zinc and thelike substantially filling the said channel, recess or socket andmolecular-1y united to said iron or steel portion, substantially asdescribed.

6. The combination with a wheel, of a composite tire secured thereto andcomprising a plurality of sections, each of said sections consisting ofan iron or steel casting having a channel, recess or socket in its outersurface, and a layer or body of softer metal, such as lead, tin, zinc,and the like, substantially filling said channel, recess or socket andmolecularly united to the iron or steel casting, substantially asdescribed.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

EDWARD I. BRADDOCK. Witnesses:

J AS. H. CHURCHILL, J. MURPHY.

